Love the intent, but this is just a really silly implementation. Make registering older vehicles with higher polution levels more expensive, and provide a tax credit or incentive for getting rid of them. There's tons of ways to do this with less overhead and without a surprise punative fine for people too poor to buy a new vehicle.
Not to mention, everyone's already fed up with the constant level of surveillance. Always being on camera in some way is something we need to put more thought into before we add to the problem.
You do realize there are tons of people who are literally forced to drive old gas cars because its all they can afford, and there is no public transportation right? Calling them murderers for trying to feed themselves is just disingenuous.
In a car? That's a very dumb idea. Even if you can't get by train for some reason, you'll most likely leave your car in a giant parking lot in a nearby town and then catch a train. Have you ever tried driving in London? You'll walk faster!